102700138 has 4 divisors (see below), whose sum is σ = 154050210. Its totient is φ = 51350068.

The previous prime is 102700097. The next prime is 102700141. The reversal of 102700138 is 831007201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831007201 = 281 ⋅2957321.

It can be written as a sum of positive squares in only one way, i.e., 68442529 + 34257609 = 8273^2 + 5853^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25675033 + ... + 25675036.

Almost surely, 2^102700138 is an apocalyptic number.

102700138 is a deficient number, since it is larger than the sum of its proper divisors (51350072).

102700138 is an equidigital number, since it uses as much as digits as its factorization.

102700138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51350071.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 102700138 is about 10134.1076568191. The cubic root of 102700138 is about 468.2994801949.

Adding to 102700138 its reverse (831007201), we get a palindrome (933707339).

The spelling of 102700138 in words is "one hundred two million, seven hundred thousand, one hundred thirty-eight".